Fixed bug #61019 (Out of memory on command stream_get_contents)

NEWS

@@ -3,6 +3,7 @@ PHP                                                                        NEWS
 ?? ??? 2014, PHP 5.4.28
 
 - Core:
+  . Fixed bug #61019 (Out of memory on command stream_get_contents). (Mike)
   . Fixed bug #64330 (stream_socket_server() creates wrong Abstract Namespace 
     UNIX sockets). (Mike)
 

ext/standard/tests/streams/bug61019.phpt

@@ -0,0 +1,78 @@
+--TEST--
+Bug #61019 (Out of memory on command stream_get_contents)
+--FILE--
+<?php
+
+echo "Test\n";
+
+$descriptorspec = array(
+	0 => array("pipe", "r"),  // stdin is a pipe that the child will read from
+	1 => array("pipe", "w"),  // stdout is a pipe that the child will write to
+	2 => array("pipe", "w")   // stderr is a pipe that the child will write to
+);
+
+$process=proc_open("echo testtext",$descriptorspec,$pipes);
+if(is_resource($process))
+{
+	stream_set_blocking($pipes[0],false);
+	stream_set_blocking($pipes[1],false);
+	stream_set_blocking($pipes[2],false);
+	stream_set_write_buffer($pipes[0],0);
+	stream_set_read_buffer($pipes[1],0);
+	stream_set_read_buffer($pipes[2],0);
+	$stdin_stream="";
+	$stderr_stream="";
+
+	echo "External command executed\n";   	
+	do                                     	
+	{
+		$process_state=proc_get_status($process);
+		$tmp_stdin=stream_get_contents($pipes[1]);   	
+		if($tmp_stdin) 
+		{
+			$stdin_stream=$stdin_stream.$tmp_stdin;
+		}
+		$tmp_stderr=stream_get_contents($pipes[2]);
+		if($tmp_stderr) 
+		{
+			$stderr_stream=$stderr_stream.$tmp_stderr;
+		}
+	} while($process_state['running']);
+
+	echo "External command exit: ".$process_state['exitcode']."\n";
+
+	//read outstanding data
+	$tmp_stdin=stream_get_contents($pipes[1]);   	
+	if($tmp_stdin) 
+	{
+		$stdin_stream=$stdin_stream.$tmp_stdin;
+	}
+	$tmp_stderr=stream_get_contents($pipes[2]);
+	if($tmp_stderr) 
+	{
+		$stderr_stream=$stderr_stream.$tmp_stderr;
+	}
+
+	fclose ($pipes[0]);
+	fclose ($pipes[1]);
+	fclose ($pipes[2]);
+
+	proc_close($process);    
+
+	echo "STDOUT: ".$stdin_stream."\n";
+	echo "STDERR: ".$stderr_stream."\n";
+}
+else
+{
+	echo "Can't start external command\n";
+}
+?>
+===DONE===
+--EXPECT--
+Test
+External command executed
+External command exit: 0
+STDOUT: testtext
+
+STDERR: 
+===DONE===

main/streams/streams.c

@@ -736,6 +736,10 @@ PHPAPI size_t _php_stream_read(php_stream *stream, char *buf, size_t size TSRMLS
 
 		if (!stream->readfilters.head && (stream->flags & PHP_STREAM_FLAG_NO_BUFFER || stream->chunk_size == 1)) {
 			toread = stream->ops->read(stream, buf, size TSRMLS_CC);
+			if (toread == (size_t) -1) {
+				/* e.g. underlying read(2) returned -1 */
+				break;
+			}
 		} else {
 			php_stream_fill_read_buffer(stream, size TSRMLS_CC);